Cracking Catalyst Additives Based on МеОх/Al2O3 (Ме = Cu, Fe, Ce, Co, Mn, La) Systems to Decrease the Nitrogen Oxide Content in Generation Gases

IF 0.9 Q4 ENGINEERING, CHEMICAL

Catalysis in Industry Pub Date : 2026-02-27 DOI:10.1134/S2070050425700205

E. O. Kobzar’, T. V. Bobkova, O. V. Potapenko, M. O. Anan’eva, D. N. Ogurtsova, V. A. Koveza

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Abstract

The effect of the nature of nitrogen-containing compounds introduced into a model cracking feedstock (n-hexadecane) on the composition of flue gases formed during catalyst regeneration has been studied. It has been found that the content of CO and NO_x in the flue gases grows with an increase in the basicity and molecular weight of nitrogen compounds in the following order: pyridine < n-butylamine < pyrrole < quinoline < indole. The effect of a Pt-based CO afterburning promoter on the regeneration gas composition has been studied. The introduction of this additive provides a decrease in the CO concentration in the regeneration gases by 99.4%; however, it leads to an increase in the NO_x concentration by 72.1%. Additives for decreasing the nitrogen oxide content in cracking catalyst regeneration gases have been synthesized and studied. These additives are represented by МеО_х (Me = Cu, Fe, Ce, Co, Mn, La) oxide systems supported on γ-alumina. The introduction of the studied additives into the catalyst system at the regeneration stage provides a decrease in the content of nitrogen oxides formed during regeneration. For the additive based on copper oxide, the efficiency in decreasing the nitrogen oxide content in regeneration gases is up to 12.2%.

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基于МеОх/Al2O3 （Ме = Cu, Fe, Ce, Co, Mn, La）体系的裂解催化剂添加剂降低生成气体中氮氧化物含量

研究了模型裂化原料（正十六烷）中引入的含氮化合物的性质对催化剂再生过程中烟气组成的影响。研究发现，烟气中CO和NOx的含量随氮化合物碱度和分子量的增加而增加，顺序为：吡啶+ lt；正丁胺+ lt；吡咯+ lt；喹啉+ lt；吲哚。研究了pt基CO加力燃烧促进剂对再生气组成的影响。该添加剂的引入使再生气体中的CO浓度降低了99.4%；然而，它导致NOx浓度增加了72.1%。合成并研究了降低裂化催化剂再生气中氮氧化物含量的助剂。这些添加剂由МеОх （Me = Cu, Fe, Ce, Co, Mn, La）氧化物体系负载在γ-氧化铝上。在再生阶段将所研究的添加剂引入催化剂系统，可降低再生过程中形成的氮氧化物的含量。对于以氧化铜为基础的添加剂，降低再生气体中氮氧化物含量的效率可达12.2%。

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来源期刊

Catalysis in Industry ENGINEERING, CHEMICAL-

CiteScore

1.30

自引率

14.30%

发文量

期刊介绍： The journal covers the following topical areas: Analysis of specific industrial catalytic processes: Production and use of catalysts in branches of industry: chemical, petrochemical, oil-refining, pharmaceutical, organic synthesis, fuel-energetic industries, environment protection, biocatalysis; technology of industrial catalytic processes (generalization of practical experience, improvements, and modernization); technology of catalysts production, raw materials and equipment; control of catalysts quality; starting, reduction, passivation, discharge, storage of catalysts; catalytic reactors.Theoretical foundations of industrial catalysis and technologies: Research, studies, and concepts : search for and development of new catalysts and new types of supports, formation of active components, and mechanochemistry in catalysis; comprehensive studies of work-out catalysts and analysis of deactivation mechanisms; studies of the catalytic process at different scale levels (laboratory, pilot plant, industrial); kinetics of industrial and newly developed catalytic processes and development of kinetic models; nonlinear dynamics and nonlinear phenomena in catalysis: multiplicity of stationary states, stepwise changes in regimes, etc. Advances in catalysis: Catalysis and gas chemistry; catalysis and new energy technologies; biocatalysis; nanocatalysis; catalysis and new construction materials.History of the development of industrial catalysis.